diff options
author | Georgi Djakov <georgi.djakov@linaro.org> | 2019-01-16 19:10:59 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-22 15:37:25 +0300 |
commit | 3697ff4340ba636f5ec75096713372973719a0f2 (patch) | |
tree | 689d495fab6801a6d3e3191f7be9805305770f38 /drivers/interconnect/core.c | |
parent | 87e3031b6fbd83ea83adf1bf9602bcce313ee787 (diff) | |
download | linux-3697ff4340ba636f5ec75096713372973719a0f2.tar.xz |
interconnect: Add debugfs support
Add a functionality to provide information about the current constraints
per each node and provider.
Reviewed-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/interconnect/core.c')
-rw-r--r-- | drivers/interconnect/core.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index a8c2bd35197f..8091d998549a 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -6,6 +6,7 @@ * Author: Georgi Djakov <georgi.djakov@linaro.org> */ +#include <linux/debugfs.h> #include <linux/device.h> #include <linux/idr.h> #include <linux/init.h> @@ -21,6 +22,7 @@ static DEFINE_IDR(icc_idr); static LIST_HEAD(icc_providers); static DEFINE_MUTEX(icc_lock); +static struct dentry *icc_debugfs_dir; /** * struct icc_req - constraints that are attached to each node @@ -48,6 +50,59 @@ struct icc_path { struct icc_req reqs[]; }; +static void icc_summary_show_one(struct seq_file *s, struct icc_node *n) +{ + if (!n) + return; + + seq_printf(s, "%-30s %12u %12u\n", + n->name, n->avg_bw, n->peak_bw); +} + +static int icc_summary_show(struct seq_file *s, void *data) +{ + struct icc_provider *provider; + + seq_puts(s, " node avg peak\n"); + seq_puts(s, "--------------------------------------------------------\n"); + + mutex_lock(&icc_lock); + + list_for_each_entry(provider, &icc_providers, provider_list) { + struct icc_node *n; + + list_for_each_entry(n, &provider->nodes, node_list) { + struct icc_req *r; + + icc_summary_show_one(s, n); + hlist_for_each_entry(r, &n->req_list, req_node) { + if (!r->dev) + continue; + + seq_printf(s, " %-26s %12u %12u\n", + dev_name(r->dev), r->avg_bw, + r->peak_bw); + } + } + } + + mutex_unlock(&icc_lock); + + return 0; +} + +static int icc_summary_open(struct inode *inode, struct file *file) +{ + return single_open(file, icc_summary_show, inode->i_private); +} + +static const struct file_operations icc_summary_fops = { + .open = icc_summary_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + static struct icc_node *node_find(const int id) { return idr_find(&icc_idr, id); @@ -711,6 +766,21 @@ int icc_provider_del(struct icc_provider *provider) } EXPORT_SYMBOL_GPL(icc_provider_del); +static int __init icc_init(void) +{ + icc_debugfs_dir = debugfs_create_dir("interconnect", NULL); + debugfs_create_file("interconnect_summary", 0444, + icc_debugfs_dir, NULL, &icc_summary_fops); + return 0; +} + +static void __exit icc_exit(void) +{ + debugfs_remove_recursive(icc_debugfs_dir); +} +module_init(icc_init); +module_exit(icc_exit); + MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org>"); MODULE_DESCRIPTION("Interconnect Driver Core"); MODULE_LICENSE("GPL v2"); |